Media Converter (imconverter)

Media Converter is a complete cross-platform solution to convert audio and video files built on top of the FFmpeg command-line tool.

Download Links:

• Firefox: https://addons.mozilla.org/firefox/addon/media-conversion-tool/
• Chrome: https://chrome.google.com/webstore/detail/media-converter-and-muxer/ocnfecjfebnllnapjjoncgjnnkfmobjc
• Opera: https://addons.opera.com/en/extensions/details/media-converter-and-muxer/

FAQs page: http://add0n.com/media-converter.html